Staple



y 1937- o. s. NELSON 2,081,062

S TAPLE Filed May 23, 1936 ATTORNEYS Patented May 18, 1937 UNITED STATESPATENT OFFICE 1 Claim.

My invention relates to improvements in staples and the object thereofis to provide a device of this character adapted to positively interlockwith a rod, wire strand, or bar, to prevent endwise creeping of saidrod, strand, or bar, as the case may be, relative to a support againstwhich it is secured by said staple.

Another object is to provide a staple for the purpose above set forthadapted, under the action of driving blows against the same, to effect agradual clamping action against the sides of a rod or strand beingsecured in position thereby.

Another object is to provide a staple having legs adapted to closetogether under the action of driving blows directed against the stapleand having an inside cutting edge for biting into a rod or bar.

Other and subordinate objects together with the precise nature of myimprovements will be 20 clearly understood when the followingdescription and claim are read in conjunction with the accompanyingdrawing.

In said drawing:

Figure 1 is a view partly in side elevation and partly in sectionillustrating my improved staple O started in a support preparatory tosecuring a rod to the latter.

Figure 2 is a similar view illustrating the staple driven to its homeposition.

Figure 3 is aview in transverse section taken on the line 33 of Figure 2looking downward. Figure 4 is a view in edge elevation, and

Figure 5 is a view in vertical transverse section.

Referring to the drawing by numeral, my improved staple is of the usualU-shaped form including a substantially semi-circular head portion 1 andopposed leg portions 2 diverging out Wardly, slightly, toward theirouter ends. As distinguished from the usual article, however, the stapleof my invention is formed from a length of resilient rod-like hardenedsteel of rectangular shape in cross section bent upon itself medially todispose opposed corner edges there- 45 of in the plane of the staplewhereby the staple is provided with inner and outer sharp edges 3 and 4extending around its inner and outer sides,

respectively, and opposed cutting edges 5 inter mediate the cuttingedges 3 and 4. The outer 50 ends .of the legs 2 are oppositely beveled,relatively, to provide cam faces 6 inclining from the outer cuttingedges 4 to the inner cutting edges 3 toward the extremities of said legs2.

The legs 2 of the described staple when driven into a support, by virtueof the cam faces 6, will be closed gradually as the staple is drivenhome into the support and thereby exert a gradual clamping actionagainst an element such as a rod 1 being secured to said support. Thestaple is so designed that under such clamping action the inner cuttingedges 3 will bite into the sides of the element being secured therebyand form a groove 8 in said element with which said edge 3 willinterlock. Since the inner cutting edge 3 extends around the inside ofthe head portion l of the staple the groove 8 formed by said cuttingedge 3 will extend at least half way around the element 1, it beingunderstood, of course, that the staples are selected for use as regardssize in accordance with the size of the element which it is desired tosecure to a support.

Staples constructed according to my invention are particularly useful insecuring sections, one of which is rep-resented at 9, of concrete formstogether by means of large gauge wire since by the interlockingengagement effected with such staples such wire may be secured to theposts in a taut condition. Fur} thermore such staples by virtue of theircross sectional shape are effectively reinforced against lateralbending. The cutting edges 3, 4 and 5 facilitate driving the staple bytheir cutting action in wooden or other supports. The outer legs of thestaple may be otherwise formed than as" described to provide cam faces 6thereon functioning as described, it being understood that variations inthe inclination and extent of said faces are comprehended by myinvention.

Obviously, other details of construction described in the foregoing maybe varied without departing from the spirit of the inventive conceptdisclosed and it is to be understood that right is herein reserved tomodifications of such details falling within the scope of the appendedclaim.

What I claim is:

A staple comprising a U.-shaped member formed of a rectangular rod bentupon itself in a manner to dispose a corner of one leg in confrontingposition to a corner of the opposite leg, the confronting corner of eachleg comprising a keen edge for biting engagement with theperiphery of arod or wire strand to hold the rod 7 OSCAR S. NELSON.

